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Simplifying 9d + 3.5 = 2d Reorder the terms: 3.5 + 9d = 2d Solving 3.5 + 9d = 2d Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-2d' to each side of the equation. 3.5 + 9d + -2d = 2d + -2d Combine like terms: 9d + -2d = 7d 3.5 + 7d = 2d + -2d Combine like terms: 2d + -2d = 0 3.5 + 7d = 0 Add '-3.5' to each side of the equation. 3.5 + -3.5 + 7d = 0 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + 7d = 0 + -3.5 7d = 0 + -3.5 Combine like terms: 0 + -3.5 = -3.5 7d = -3.5 Divide each side by '7'. d = -0.5 Simplifying d = -0.5
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